Bed-plate for beater-engines.



R. A. NGRTH.

EED PLATE EOE :BEATEE ENGINES.

'IPLIOATION'TILBD AUG. 22, 1908.

Patented Jan. 12, 1909.

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R. A. NORTH.

BED PLATE POB. BBATEB. ENGINES.

AYPLIOATION FILED AUG. 22, 1908.

Patented Jan. 12, 1909.

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UNTED STATES Parana? ernten RAY A. NORTH, OF BELOIT, WISCONSIN, ASSIGNOR TO REX J. DOWD, OF BELOIT, WISCONSIN.

BED-PLATE FOR BEATER-ENGNES.

Application filed August 22, 1908.

To all Iwhom it may concern:

Be it known that I, RAY A. N onTH, a citi- Zen of the United States, residing at Beloit, in the county of Rock and State of W'isconsin, have invented certain new and useful Improvements in Bed-Plates for Beater- Engines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in bed-plates used in beater-engines in the manufacture of paper and particularly to improvements in bed-plates used in the manufacture of paper employing coarse stock and producing therefrom Manila board and like product.

An object of my invention is to provide la bedr-plate which will keep the bars of the beater-roll sharp, even and straight on the cutting edge.

With the bed-plates now in common use, in engines used for beating coarse heavy stock, the bars of the beater-roll become rounded and blunt, the beater-roll being adjusted so that its bars pass in close proximity to the bars of the bed-plate. ln bedplates embodying my invention, the cutting edge of the bar is maintained sharp, even and straight, whereby less power is necessary to operate the beating engine. The bars of the beater-roll may be adjusted further from the bars of the bed plate and the expense and inconvenience of stopping the beater-engine, removing the beater-roll and sharpening the beater-roll bars are avoided. By reason of its being permissible to adjust the beater-roll bars at a further distance from the bars of the bed plate, a greater brushing effect is obtainable where my new bed plate is used and less of a grinding effort on the stock is necessary, due to the sharp and even condition in which the edges of the beater-roll bars are kept.

ln the drawings illustrating the principle of my invention and the best mode now known to me of applying that principle, Figure l is a plan view of one form of bed plate embodying my invention; Fig. 2 is a section on line A-A of Fig. l; Fig. 3 shows the way in which the opposed ends of the two plates of abrasive material are locked; Fig. t is a side elevation of the plate shown in Fig. l; Fig. 5 is a plan view of another form of bed-plate embodying my invention; Fig. 6 is a section on line B-B of Fig.

Specification of Letters Patent.

Patented Jan. 12, 1909. Y

seran Nc. 449,849.

' Fig. 7 shows a part of a beater-roll bar l the edge of which is blunt and rounded; Fig. S shows a part of a beater-roll bar the edge of which is sharp and even; and Figs. 9

ments of the wood, steel and abrasive material.

l-leretofore it has been common to make bed-plates of bars of steel and bars of wood, the bars of steel alternating with the bars of wood and all the bars being bound togetherl by bolts. In carrying out my invention, l provide a bar of abrasive material and dispose it between groups consisting of alternate bars of wood and steel. Thus, in the making of the elbow bed-plate shown in Fig. ll, a series of steel bars a and of wooden strips or bars b are used to build up a group of bars, the steel bars being placed between shown in Fig. 2. At the center of the bcdplate there are placed two slabs c of abrasive material, such as emery, carborundum or like substance which, by acting upon the edges of the beater-roll bars, will keep them sharp. The outside steel plates It, z', serve as frame or casing members. By means of the bolts d, the bars, plates and slabs composing the bed-plate are bound firmly together. ln

two slabs c of abrasive material are fitted together to form a closed joint is shown.

In Figs. 5 and 6 there is shown a straight bed-platehaving a plurality of steel plates e aXis of the bed-plate and between which are placed strips of. wood Z1. Between the groups consist-ing of alternate wood strips b and steel bars c are placed slabs f of abrasive material, the object of which is the same as that of the slabs c. The right hand end of one slab of abrasive material lies directly opposite the left hand end of the next slab of abrasive material, so that all parts of the edge of the beater-roll bar may be subjected to the same amount of grinding by the slabs of abrasive material. The steel plates g, g serve as a casing.

The width of the slabs of abrasive material will vary somewhat with the width of the bed-plate; and in ordinary practice the abrasive slab will not be far from one inch in width. In the elbow plate of Fig. l, the slabs c of abrasive material are preferably centrally disposed with regard to the bedto 18, inclusive, illustrate various arrangeand backed by the wooden strips as is best f Fig. 3, the manner in which the ends of the Y which lie inclined towards the longitudinal e llO plate and are thereby Well supported by the wooden boards b and steel plates a on each side of it. Y

In the igures shown on Sheet 2 of the drawings, Figs. 9 to 13, inclusive, are, respectively, end views of the bed-plates shown in fragmentary plan view of Figs. 14 to 18, inclusive.

In Figs. 9 to 14, the outside steel plates h, fi, serve as frame members to form a casing. They are held together by the bolts d, and between them are placed groups of bars consisting of the steel bars e and wooden bars b', the steel bars e lying between and being cushioned or backed by the wooden bars or strips b. These bars c, b', are inclined to the longitudinal axis of the bedplates and between the several groups of bars are placed plates f of abrasive material. In the case illustrated by these Figs. 9 and 14, the steel bars e are one-eighth inch thick, the strips of wood l5Y are one-quarter inch thick and the outside or casing steel plates z, i are one-half inch thick. The plates f of abrasive material are one-half inch thick.

The bed-plate illustrated in Figs. 10 and 15, diifers from that illustrated in Figs. 9 and' 14, in that the plates f of abrasive material are one inch thick and each group of steel and wooden bars is made up of five bars of wood and four bars of steel instead of six bars of wood and five bars of steel, which is the case in the bed-plate illustrated in Figs. 9 and 14. f

In the elbow plate illustrated in Figs. 11 and 16, the groups of steel and Wooden bars are each made up of two bars a of steel and three bars b of wood; and between each of the groups of steel and wooden bars is placed a plate of abrasive material c onehalf inch thick. Y

The bed-plate illustrated in Figs. 12 and 17 differs from that illustrated in Figs. 11 and 16 in that the groups of steel bars a and wooden bars b consist of four wooden bars Z2 and three steel bars a; and the groups of steel and wooden barsare separated by plates of abrasive material c three-fourths of an inch thick.

The bed-plate shown in Figs. 13 and 18 consists of the casing-plates z, z', between which are placed two groups consisting of steel bars and wooden strips or bars, each group consisting of ten Wooden bars b and nine steel bars a; the two groups being separated bya slab c* of abrasive material an inch thick.

The object had in view in my new construction heretofore described is not to act upon the paper stock by means of the bars of abrasive material; but on the contrary it is to provide merely suiicient abrasive material to act upon the beater-roll bars to keep the edges of the latter sharp, even and straight and'therefor in excellent working condition to act upon the stock and to coact with the steel and wooden bars of the bedplate to grind the stock with a minimum expenditure of power.

I claim:

1. A bed-plate consisting of a plurality of groups of bars, yeach of said groupsV being made up of metal bars placed between wooden bars or strips; and a slab of abrasive material interposed between said groups of bars for sharpening the bars of the beaterroll.

2. A bed-plate consisting of a plurality of groups of bars, each of said groups'being made up of steel bars placed between wooden bars or strips; said bars lying at an angle to the longitudinal axis of the bed-plate; and slabs of abrasive material linterposed between and separating said groups; the opposed ends of said slabs lying on opposite sides of said bed-plate and separated from each other by a group of metal bars or strips.

3. A bed-plate consisting of a plurality of groups of bars, each of said groups consisting of metal bars placed between wooden bars or strips; said bars lying at an angle tothe longitudinal axis of said bed-plate; plates which inclose said groups of bars and serve as a casing therefor; a plurality of slabs of abrasive material which are interposed between and which separate said groups of bars from each other; and means for holding said plates, bars and slabs in assembled relation.

In testimony whereof I have hereunto set my hand at said Beloit, this 15th day of August, A. D., 1908, in the presence of the two undersigned witnesses.

RAY A. NORTH.

Vitnesses H. W. ADAMS, CLARA RANKIN. 

